diff --git a/include/gc_allocator.h b/include/gc_allocator.h
index 597c7f13..587286be 100644
--- a/include/gc_allocator.h
+++ b/include/gc_allocator.h
@@ -312,6 +312,7 @@ public:
 
 template<>
 class traceable_allocator<void> {
+public:
   typedef size_t      size_type;
   typedef ptrdiff_t   difference_type;
   typedef void*       pointer;
